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source: protocols/jabber/presence.c @ 3e6764a

Last change on this file since 3e6764a was 8c1eb80, checked in by Wilmer van der Gaast <wilmer@…>, at 2008-02-03T16:59:39Z
Implemented XEP-0115. This adds some info to the <presence/> tags so clients interested in capabilities can cache discovery info, so they don't have to ask about it every time you/they log in.
Property mode set to `100644`
File size: 8.7 KB

Line
1	/***************************************************************************\
2	* *
3	* BitlBee - An IRC to IM gateway *
4	* Jabber module - Handling of presence (tags), etc *
5	* *
6	* Copyright 2006 Wilmer van der Gaast <wilmer@gaast.net> *
7	* *
8	* This program is free software; you can redistribute it and/or modify *
9	* it under the terms of the GNU General Public License as published by *
10	* the Free Software Foundation; either version 2 of the License, or *
11	* (at your option) any later version. *
12	* *
13	* This program is distributed in the hope that it will be useful, *
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16	* GNU General Public License for more details. *
17	* *
18	* You should have received a copy of the GNU General Public License along *
19	* with this program; if not, write to the Free Software Foundation, Inc., *
20	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
21	* *
22	\***************************************************************************/
23
24	#include "jabber.h"
25
26	xt_status jabber_pkt_presence( struct xt_node *node, gpointer data )
27	{
28	struct im_connection *ic = data;
29	char *from = xt_find_attr( node, "from" );
30	char type = xt_find_attr( node, "type" ); / NULL should mean the person is online. */
31	struct xt_node c, cap;
32	struct jabber_buddy bud, send_presence = NULL;
33	int is_chat = 0;
34	char *s;
35
36	if( !from )
37	return XT_HANDLED;
38
39	if( ( s = strchr( from, '/' ) ) )
40	{
41	*s = 0;
42	if( jabber_chat_by_jid( ic, from ) )
43	is_chat = 1;
44	*s = '/';
45	}
46
47	if( type == NULL )
48	{
49	if( !( bud = jabber_buddy_by_jid( ic, from, GET_BUDDY_EXACT \| GET_BUDDY_CREAT ) ) )
50	{
51	if( set_getbool( &ic->irc->set, "debug" ) )
52	imcb_log( ic, "Warning: Could not handle presence information from JID: %s", from );
53	return XT_HANDLED;
54	}
55
56	g_free( bud->away_message );
57	if( ( c = xt_find_node( node->children, "status" ) ) && c->text_len > 0 )
58	bud->away_message = g_strdup( c->text );
59	else
60	bud->away_message = NULL;
61
62	if( ( c = xt_find_node( node->children, "show" ) ) && c->text_len > 0 )
63	{
64	bud->away_state = (void*) jabber_away_state_by_code( c->text );
65	}
66	else
67	{
68	bud->away_state = NULL;
69	/* Let's only set last_act if there's no away state,
70	since it could be some auto-away thingy. */
71	bud->last_act = time( NULL );
72	}
73
74	if( ( c = xt_find_node( node->children, "priority" ) ) && c->text_len > 0 )
75	bud->priority = atoi( c->text );
76	else
77	bud->priority = 0;
78
79	if( bud && ( cap = xt_find_node( node->children, "c" ) ) &&
80	( s = xt_find_attr( cap, "xmlns" ) ) && strcmp( s, XMLNS_CAPS ) == 0 )
81	{
82	/* This <presence> stanza includes an XEP-0115
83	capabilities part. Not too interesting, but we can
84	see if it has an ext= attribute. */
85	s = xt_find_attr( cap, "ext" );
86	if( s && ( strstr( s, "cstates" ) \|\| strstr( s, "chatstate" ) ) )
87	bud->flags \|= JBFLAG_DOES_XEP85;
88
89	/* This field can contain more information like xhtml
90	support, but we don't support that ourselves.
91	Officially the ext= tag was deprecated, but enough
92	clients do send it.
93
94	(I'm aware that this is not the right way to use
95	this field.) See for an explanation of ext=:
96	http://www.xmpp.org/extensions/attic/xep-0115-1.3.html*/
97	}
98
99	if( is_chat )
100	jabber_chat_pkt_presence( ic, bud, node );
101	else
102	send_presence = jabber_buddy_by_jid( ic, bud->bare_jid, 0 );
103	}
104	else if( strcmp( type, "unavailable" ) == 0 )
105	{
106	if( ( bud = jabber_buddy_by_jid( ic, from, 0 ) ) == NULL )
107	{
108	if( set_getbool( &ic->irc->set, "debug" ) )
109	imcb_log( ic, "Warning: Received presence information from unknown JID: %s", from );
110	return XT_HANDLED;
111	}
112
113	/* Handle this before we delete the JID. */
114	if( is_chat )
115	{
116	jabber_chat_pkt_presence( ic, bud, node );
117	}
118
119	if( strchr( from, '/' ) == NULL )
120	/* Sometimes servers send a type="unavailable" from a
121	bare JID, which should mean that suddenly all
122	resources for this JID disappeared. */
123	jabber_buddy_remove_bare( ic, from );
124	else
125	jabber_buddy_remove( ic, from );
126
127	if( is_chat )
128	{
129	/* Nothing else to do for now? */
130	}
131	else if( ( s = strchr( from, '/' ) ) )
132	{
133	*s = 0;
134
135	/* If another resource is still available, send its presence
136	information. */
137	if( ( send_presence = jabber_buddy_by_jid( ic, from, 0 ) ) == NULL )
138	{
139	/* Otherwise, count him/her as offline now. */
140	imcb_buddy_status( ic, from, 0, NULL, NULL );
141	}
142
143	*s = '/';
144	}
145	else
146	{
147	imcb_buddy_status( ic, from, 0, NULL, NULL );
148	}
149	}
150	else if( strcmp( type, "subscribe" ) == 0 )
151	{
152	jabber_buddy_ask( ic, from );
153	}
154	else if( strcmp( type, "subscribed" ) == 0 )
155	{
156	/* Not sure about this one, actually... */
157	imcb_log( ic, "%s just accepted your authorization request", from );
158	}
159	else if( strcmp( type, "unsubscribe" ) == 0 \|\| strcmp( type, "unsubscribed" ) == 0 )
160	{
161	/* Do nothing here. Plenty of control freaks or over-curious
162	souls get excited when they can see who still has them in
163	their buddy list and who finally removed them. Somehow I
164	got the impression that those are the people who get
165	removed from many buddy lists for "some" reason...
166
167	If you're one of those people, this is your chance to write
168	your first line of code in C... */
169	}
170	else if( strcmp( type, "error" ) == 0 )
171	{
172	return jabber_cache_handle_packet( ic, node );
173
174	/*
175	struct jabber_error *err;
176	if( ( c = xt_find_node( node->children, "error" ) ) )
177	{
178	err = jabber_error_parse( c, XMLNS_STANZA_ERROR );
179	imcb_error( ic, "Stanza (%s) error: %s%s%s", node->name,
180	err->code, err->text ? ": " : "",
181	err->text ? err->text : "" );
182	jabber_error_free( err );
183	} */
184	}
185
186	if( send_presence )
187	{
188	int is_away = 0;
189
190	if( send_presence->away_state && !( *send_presence->away_state->code == 0 \|\|
191	strcmp( send_presence->away_state->code, "chat" ) == 0 ) )
192	is_away = OPT_AWAY;
193
194	imcb_buddy_status( ic, send_presence->bare_jid, OPT_LOGGED_IN \| is_away,
195	( is_away && send_presence->away_state ) ?
196	send_presence->away_state->full_name : NULL,
197	send_presence->away_message );
198	}
199
200	return XT_HANDLED;
201	}
202
203	/* Whenever presence information is updated, call this function to inform the
204	server. */
205	int presence_send_update( struct im_connection *ic )
206	{
207	struct jabber_data *jd = ic->proto_data;
208	struct xt_node node, cap;
209	char *show = jd->away_state->code;
210	char *status = jd->away_message;
211	struct groupchat *c;
212	int st;
213
214	node = jabber_make_packet( "presence", NULL, NULL, NULL );
215	xt_add_child( node, xt_new_node( "priority", set_getstr( &ic->acc->set, "priority" ), NULL ) );
216	if( show && *show )
217	xt_add_child( node, xt_new_node( "show", show, NULL ) );
218	if( status )
219	xt_add_child( node, xt_new_node( "status", status, NULL ) );
220
221	/* This makes the packet slightly bigger, but clients interested in
222	capabilities can now cache the discovery info. This reduces the
223	usual post-login iq-flood. See XEP-0115. At least libpurple and
224	Trillian seem to do this right. */
225	cap = xt_new_node( "c", NULL, NULL );
226	xt_add_attr( cap, "xmlns", XMLNS_CAPS );
227	xt_add_attr( cap, "node", "http://bitlbee.org/xmpp/caps" );
228	xt_add_attr( cap, "ver", BITLBEE_VERSION ); /* The XEP wants this hashed, but nobody's doing that. */
229	xt_add_child( node, cap );
230
231	st = jabber_write_packet( ic, node );
232
233	/* Have to send this update to all groupchats too, the server won't
234	do this automatically. */
235	for( c = ic->groupchats; c && st; c = c->next )
236	{
237	struct jabber_chat *jc = c->data;
238
239	xt_add_attr( node, "to", jc->my_full_jid );
240	st = jabber_write_packet( ic, node );
241	}
242
243	xt_free_node( node );
244	return st;
245	}
246
247	/* Send a subscribe/unsubscribe request to a buddy. */
248	int presence_send_request( struct im_connection ic, char handle, char *request )
249	{
250	struct xt_node *node;
251	int st;
252
253	node = jabber_make_packet( "presence", NULL, NULL, NULL );
254	xt_add_attr( node, "to", handle );
255	xt_add_attr( node, "type", request );
256
257	st = jabber_write_packet( ic, node );
258
259	xt_free_node( node );
260	return st;
261	}

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